refactor: try to prevent dangling splits

src/tui/mainview.zig

@@ -1515,14 +1515,19 @@ pub fn handle_editor_event(self: *Self, editor: *ed.Editor, m: tp.message) tp.re
 
     if (try m.match(.{ "E", "close" })) {
         if (!self.closing_project) {
-            const view = self.get_view_for_editor(editor) orelse return;
+            const view = self.get_view_for_editor(editor) orelse {
+                if (self.get_next_mru_buffer(.non_hidden)) |file_path|
+                    self.show_file_async(file_path);
+                return;
+            };
             if (self.get_next_mru_buffer_for_view(view, .non_hidden)) |file_path|
                 self.show_file_async(file_path)
+            else if (self.views.widgets.items.len == 1)
+                self.show_home_async()
             else {
-                if (self.views.widgets.items.len == 1)
+                tp.self_pid().send(.{ "cmd", "close_split", .{} }) catch return;
-                    self.show_home_async()
+                if (self.get_next_mru_buffer(.non_hidden)) |file_path|
-                else
+                    self.show_file_async(file_path);
-                    tp.self_pid().send(.{ "cmd", "close_split", .{} }) catch return;
             }
         } else self.show_home_async();
         return;
@@ -1833,7 +1838,7 @@ fn create_home(self: *Self) !void {
     tui.resize();
 }
 
-fn create_home_split(self: *Self) !void {
+pub fn create_home_split(self: *Self) !void {
     tui.reset_drag_context();
     try self.add_and_activate_view(try home.create(self.allocator, Widget.to(self)));
     _ = try self.widgets_widget.msg(.{"splits_updated"});

src/tui/status/tabs.zig

@@ -462,7 +462,7 @@ pub const TabBar = struct {
     fn move_tab_next(self: *Self) void {
         tp.trace(tp.channel.debug, .{"move_tab_next"});
         const this_idx = self.find_buffer_tab(self.active_focused_buffer_ref orelse return) orelse return;
-        const other_buffer_ref = self.find_next_tab_buffer() orelse return;
+        const other_buffer_ref = self.find_next_tab_buffer() orelse return self.move_tab_to_new_split(this_idx);
         const other_idx = self.find_buffer_tab(other_buffer_ref) orelse return;
         self.move_tab_to(other_idx, this_idx);
     }
@@ -537,6 +537,21 @@ pub const TabBar = struct {
             navigate_to_buffer(src_tab.buffer_ref);
     }
 
+    fn move_tab_to_new_split(self: *Self, src_idx: usize) void {
+        const mv = tui.mainview() orelse return;
+        const src_tab = &self.tabs[src_idx];
+        var tabs_in_view: usize = 0;
+        for (self.tabs) |*tab| if (tab.view) |view| {
+            if (view == src_tab.view)
+                tabs_in_view += 1;
+        };
+        if (tabs_in_view > 1) {
+            const view = mv.get_view_count();
+            mv.create_home_split() catch return;
+            self.move_tab_to_view(view, src_idx);
+        }
+    }
+
     fn place_next_tab(self: *Self, position: enum { before, after }, buffer_ref: usize) void {
         tp.trace(tp.channel.debug, .{ "place_next_tab", position, buffer_ref });
         const tab_idx = for (self.tabs, 0..) |*tab, idx| if (tab.buffer_ref == buffer_ref) break idx else continue else {